Suggestions on Installing Sound System

Yeah, i'm not that great with all the specifics of installing my car audio system so i need some help. I'm installing the system into a 2004 Grand Am. The system consists of two 12in Subwoofers in one box, with 1100 MAX watt power, and two amps, both 460 Watt MAX Power. Both items are the brand name DUAL. The subwoofer is bridged so i can't connect one amp to one sub and the other to the other sub. I'm putting the subwoofer in my trunk, and bolting the amps to the back of my seat, on each side of the sub. I dont yet have a deck to put in my car yet though, except for the standard deck in the Grand Am model. What sort of deck would i need to power this system. I was wondering what all materials i will need to install this and how the best way would be to do it if there is more than one way to do it. I know one thing that i'm almost sure i need is (i can't remember what its called exactly) but its a device that links up the two amps together. Anyways yeah if anyone has any suggestions i would be grateful. And if you have price ranges for how you think to set it up that would be awesome too. Thanks